Tension-adjusting coupling.



H. L.; A. E. d: H. 0. SHORT. `TENSION ADJUSTING GOUPLING. unicum! funn JUNE 21,1'910.

1,002,001. Pawnwuuws, 1911.

PATENT GFFICE.

HORACE LEONARD SHORT, Amma EUSTAGE SHORT, AND HUGH oswALD SHORT, .oF

BATTERSA PARK, LONDON, ENGLAND.

TENsIoNADm-ST'ING COUPLING.

50 rea Specia'cion of Letters Patent. Patented Aug, 29, 191 1 Application` filed June 21,

Aso

.showing the end of the sleeve burred in- Wardly to prevent the Withdrawal of the bolt, and illustrating the latter with a forked end.' Fig. 4 shows in elevation a modified form of the bolt.

The sleeve l of ,the device is as usual' formed With internal' screw-threads, the screw-thread in one end of the sleeve being, in the reverse direction to the screw-thread at4 the opposite end. This sleeve engages as usual the screw-threaded 'ends yof bolts 2.

These bolts are, according to theeonstruotion shown in Figs. 1 to 3,`provided.` with a comparatively short enlarged screW-threa ded,

. portion 8, adapted toA be engaged-by. theV sleeve 1. The-screiv-threaded portion 3 'ofltlie bolt being of larger circumference than the Imain shank L thereof, a. shoulder 5 is 1forrned `,where the shank .joins the `threaded art. f

In order to prevent the bolt being entirely withdrawn from the sleeve, ive-bur the end of the sleeve inwardly as shown at 6 in Fig.

'3,"so as to form an abutment to the-.shoulder 5 `when the screw has been lturned outwardly as far as is desirable., t

f Then it is required to apply the tension to the wire rope "or, the like connected to the bolts .2, the sleeve 1 is so turned that .the said bolts move toward the.A center of the-'sleeve said sleeve.

asushown intFig. 1, andwhen the tension-is tojbe slackened the sleeve is turned inthe reverse direction, so that the innerl endsof the bolts 2 move toward theouter ends o'f the.

...The-j sleevelv may be eturneduntil shoulder 5 on boltfappcarsjust .outside said ".s`leeane4 as shovi'fnl in Fig, 2, and when the* fof a 'tension wiremaybe 4fixetlg" :v

safe.to:.turnfthe-,sleeveanyfarther.

lAtv-Figr the end ofthe. bolt is shown forked and having apin passed through the forked members around f which pin. the vend fFig. 4 shows an eye bolt-'of-ftheordinary- I type,buthavingan annulargroove-f-formed: .I

thereon, thus dividiIigE-the screw -in'toitwo' separate 'porti ns, Ithea-forward portion 8, -be-f #lin f of sufficient length tobins'ure' secure. conf.

Y Anect'ion betweenlthe'lboltf and sleeve 1 whenA tension i'srelievekaand',obwiously'the'part ,8in

of'thebolt is of sufficient length as to be calculated; top'carry. vall-1` the tension" lwhich the device vis constructed to sustain. lith this arrangement, when the plain portion formed the annular ugroove 7 is seen outside theA vsleeve, it Will'be'knownithat the bolt cannot :with safetybiffurther unscrewed from said sleeve rvhilethe working tension is on it.

What We claim as our invention and de sire to secure by patent is 1. A coupling for adjusting the tension of members such as tie rods, tension wires, wire ropes and the like, comprising in.` combina- 1"Ktion, an internally screivlth'reatled tubular sleeve, externally screw-threaded members adapted 'to screw" into said sleeve, and shoulders on i sa-id members limiting the screw-threads in onedirection and at suoli a ldistance, from `the corresponding extremities of such members as provides a safe lengtliof screw in said sleeve when said shoulders-.appearat the outer extremities of'said sleeve in the act of unscrewing the latter.

` 2. A coupling 4 for adjusting the tension'of members-suchastm rods, tension Wires, wire Iropes and ,the like, comprising in iconibina.-

tion,- 'an internally =..-rig'h t and :left screwe- -threaded tubular sleeve, eyeboltjsfentering Y largementsion the entering endsof "said bolts, 'night and left screw-threadsI on said enlargements'- for; engaging -the respective lscrew-threadsof said sleeve, said enlarge- -ments being' ofsrliicient lengthv to afford a safe length ofscrewthread, and the inner extremities 'of said enlargementsconstitutingL indicators, operating Withthe outer ends of said sleeve to indicate the safe limitin the act of unscrewing said sleeve.- 3. A coupling for adjust-ing the tension of' `members suchastie rods, tension Wires, wire ropes and the likeycomprising in vcombina= threaded members in respective ends ofsaid projecting' ends onfsaid sleevev adapted to constitute stops for said members-in the act o'funscrewing, saidscrew-threaded men?. bers having a safe length vof'screviw and their ends coperating with saidinwardly pro\A jecting'ends, to constitute a safety stop 4and lindicator substantially .as set forth; l Y, In'witne'ss whereof we have-hereunto set our'nhands in the presence of two witnesses.'

LBERT-EUSTAQE snoer.V `HUGH OSWALD snoer. y ,i

vWitnesses: l GRIFFITH BREWER,

Wr'mmiu A. MARSHALL.

gtion, an,..iiternallywright and leftv screwthreaded tulnilar sleeve, right and left screw# Isleeve, connecting means :'on said n 'ier'tibersA ,extending outwardlyofsaid sleeve,inwardly 1410 

